bin/45681: [dM] ps -k doesn't take "command"

[Mouse <mouse%Rodents-Montreal.ORG@localhost>]

>Number:         45681
>Category:       bin
>Synopsis:       [dM] ps's -k option doesn't accept "command" or "comm"
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    bin-bug-people
>State:          open
>Class:          change-request
>Submitter-Id:   net
>Arrival-Date:   Sun Dec 04 06:45:00 +0000 2011
>Originator:     Mouse
>Release:        NetBSD 5.1 or 4.0.1
>Organization:
        Dis-
>Environment:
        Any; noticed on
System: NetBSD Chip.Rodents-Montreal.ORG 4.0.1 NetBSD 4.0.1 (NETSERVER) #0: Tue 
Nov  8 17:03:12 EST 2011  
mouse%Chip.Rodents-Montreal.ORG@localhost:/home/mouse/kbuild/NETSERVER i386
Architecture: i386
Machine: i386

        Verified present on
System: NetBSD MVN-Home.Rodents-Montreal.ORG 5.1 NetBSD 5.1 (MVN) #2: Sun Dec 4 
00:31:50 EST 2011 
mouse%MVN-Home.Rodents-Montreal.ORG@localhost:/home/mouse/kbuild/MVN i386
Architecture: i386
Machine: i386
>Description:
        ps -k allows sorting on many fields, but for some inexplicable
        (inexplicable from a user's point of view, that is) reason
        refuses to sort on "command" or "comm".  (Incidentally, this
        restriction isn't documented.)
>How-To-Repeat:
        % ps -k command
        % ps -k comm

        Note the message and the lack of sorting.
>Fix:
        I'm not entirely sure.  It looks to me as though command
        strings (sometimes?) aren't fetched until they're about to be
        printed (in command() in print.c); perhaps they need to be
        fetched at the same time as the rest of the data, so they can
        be sorted on?  Perhaps a FETCHMODE needs to be added, sibling
        to PRINTMODE and WIDTHMODE?  Adding a STRING type is easy
        enough, but without data to operate on, there's no point.

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